Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/services/RiverInfoService.java @ 7471:fff862f4ef76
Experimental caching of datacage recommendations. The respective hook is called a lot and running the datacage over and over again when loading data can be expensive. So the generated recommendations are cached for some time.
Hopefully this improves the overall speed of loading data from the datacage.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Wed, 30 Oct 2013 15:26:21 +0100 |
parents | 6f8ce2ec40bd |
children | b73b1ab2155c |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.artifacts.services; import java.math.BigDecimal; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.dive4elements.artifacts.CallMeta; import org.dive4elements.artifacts.GlobalContext; import org.dive4elements.artifacts.common.ArtifactNamespaceContext; import org.dive4elements.artifacts.common.utils.XMLUtils; import org.dive4elements.river.artifacts.model.RiverFactory; import org.dive4elements.river.model.River; /** * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a> */ public class RiverInfoService extends D4EService { private static final Logger logger = Logger.getLogger( RiverInfoService.class); protected static final String RIVER_XPATH = "/art:river/text()"; protected XMLUtils.ElementCreator ec; protected River river; protected Element riverele; @Override protected Document doProcess( Document data, GlobalContext globalContext, CallMeta callMeta ) { String rivername = XMLUtils.xpathString( data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE); river = RiverFactory.getRiver(rivername); Document result = XMLUtils.newDocument(); if (river == null) { logger.warn("No river with name " + rivername + " found."); return null; } ec = new XMLUtils.ElementCreator( result, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX); riverele = ec.create("river-info"); double[] minmax = river.determineMinMaxDistance(); double[] minmaxq = river.determineMinMaxQ(); Element r = ec.create("river"); ec.addAttr(r, "name", river.getName(), true); ec.addAttr(r, "start", Double.toString(minmax[0]), true); ec.addAttr(r, "end", Double.toString(minmax[1]), true); ec.addAttr(r, "wstunit", river.getWstUnit().getName(), true); ec.addAttr(r, "kmup", Boolean.toString(river.getKmUp()), true); ec.addAttr(r, "minq", Double.toString(minmaxq[0]), true); ec.addAttr(r, "maxq", Double.toString(minmaxq[1]), true); ec.addAttr(r, "official", Long.toString(river.getOfficialNumber()), true); riverele.appendChild(r); result.appendChild(riverele); return result; } /** * Returns a Double as String from a BigDecimal value. * * If value is null an empty String is returned. */ protected static String getStringValue(BigDecimal value) { return value != null ? Double.toString(value.doubleValue()) : ""; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :